1 Department of General Surgery (Gastrointestinal surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China; Southwest Medical University, Luzhou, Sichuan Province, China.
2 Department of General Surgery (Gastrointestinal surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China; Southwest Medical University, Luzhou, Sichuan Province, China. Electronic address: yaohui19742022@163.com.